CN103090315A - Light guide film with multi-faceted light input edge - Google Patents
Light guide film with multi-faceted light input edge Download PDFInfo
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- CN103090315A CN103090315A CN201210517392XA CN201210517392A CN103090315A CN 103090315 A CN103090315 A CN 103090315A CN 201210517392X A CN201210517392X A CN 201210517392XA CN 201210517392 A CN201210517392 A CN 201210517392A CN 103090315 A CN103090315 A CN 103090315A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
- G02B6/0073—Light emitting diode [LED]
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention provides a light guide film which is used for uniformly distributing lights from a point light source. The light guide film comprises a multi-faced edge which is used for receiving light of the point light source and which comprises at least a first group of slopes and a second group of slopes which have plane surfaces. The two groups of slopes respectively further comprise a first slope factor and a second slope factor, wherein the first slope factor does not exceed 85 DEG and the second slope factor is at least 5 DEG, and the first slope factor is at least 5 DEG larger than the second slope factor.
Description
Technical field
The present invention relates to the light guiding film of light emitting diode (LED) back light unit, more particularly, the light guiding film that relates to the LED-backlit unit, it has a plurality of multiaspect features of cutting on the plane of incidence of light guiding film, by the incident angle of increase light transmission by light guiding film, thereby distribute equably from the light of spot light.
Background technology
Planar backlight source in typical TFT-LCD as shown in Figure 1, mainly comprises LGP 11, reflecting plate 12, a plurality of diffusion barriers 13 and prismatic lens 14, and light source 15.As one of essential elements of this planar light source 1, the light that LGP 11 receptions, propagation and redirected light source 15 send.
As shown in Figure 2, LGP 11 is generally rectangle, has light emission surface 111, the reflecting surface 112 opposite with light emission surface 111 and is positioned at least one light incident surface 113 of side.The light that sends from spot light 15 enters LGP 11 by light incident surface 113, and wherein a part is left LGP 11 by light emission surface 111, and other parts shine on reflecting surface 112.Therefore reflecting surface 112, has a plurality of light reflection structures 1121 in its surface configuration, and because distance light source 15 is far, catoptric arrangement 1121 has quite high distribution density or larger surface area, thereby reflects light to as much as possible light emission surface 111.
Usually, cold-cathode fluorescence lamp (CCFL) or light emitting diode (LED) are as the light source 11 of planar backlight 1.The use of CCFL is simpler, because it is line source.On the other hand, the use of LED is more complicated, because it is spot light.
As shown in accompanying drawing 3A, when light entered in light guiding film 23 by the optical input surface 22 that does not have edge sawtooth feature, the light propagation angle degree was limited in a conical region, and its half-cone angle equals sin
-1(1/n), wherein n is refractive index.If spot light 21 collection holds together enough closely, can be near the input edge of light guiding film, the generation clear zone, front of LED 21 and produce the dark space between LED.This phenomenon is also referred to as focus.Can eliminate dark space 215 although increase more LED 21, this is not gratifying method, because extra LED 21 has increased material cost, energy consumption, assembling complexity and the following possibility that breaks down.
Accompanying drawing 3B shows a ray tracing model, and the light that wherein sends from spot light 21 incides on the light incident surface 22 of the light guiding film 23 with edge sawtooth feature.Here spot light 21 is 20um to the distance at the input edge 22 of light guiding film 23.The diffusion angle of light is 160 degree.The refractive index of light guiding film 23 is 1.59.Ray tracing clearly illustrates that after the light from spot light 21 enters light guiding film 23 and is limited in an angle of taper.
Accompanying drawing 3C shows the illumination curve of output of the model that obtains from the light guiding film that does not have edge sawtooth feature at light input edge.Here spot light is to have lambert output and spacer knobs apart from being the LED of 6.3mm.As shown in curve of output, each curve is to begin at interval of 1mm (Y orientation) gained from distance input edge 0.5mm, and 5.5mm place, edge is inputted at distance light in clear zone and dark space still as seen.
Accompanying drawing 4A shows the input edge of the light guiding film 23 with the sawtooth feature 29 that is made of a single-slope prism.When light 14a shone on the sphering recess 17 of the flat surfaces 16 at light input edge or sawtooth feature 29, refracted ray was propagated in the angle of taper 15a vertical with the flat surfaces 16 at light input edge.A part light have large incident angle 14b, shine on the inclined-plane 18 of sawtooth feature 29, afterwards refracted ray in the large angle of taper 15b vertical with inclined-plane 18 to front propagation.The light that a part has larger incident angle 14c also shines on inclined-plane 18, and refracted ray is propagated in a larger angle of taper 15c., can again be reflected when more the light of wide-angle shines on the inclined-plane 18 that closes on when these.Due to total internal reflection, these high angle scattered light are deflected in taper 15d by inclined-plane 18.This secondary deflection has changed the direction of propagation of light and has seriously reduced the efficient of edge sawtooth feature.In order to overcome hot issue, when refracted ray should intersect at the light that a large even angle diffusion is sent from two adjacent LED with box lunch, there is no significant clear zone or dark space.
In the situation that edge sawtooth feature is the single-slope prism, for light being diffused into a larger angle, inclined-plane 18 should have large angle of inclination.But when the angle of inclination was too large, light can deflect again, the deflection wire 15d as shown in accompanying drawing 4A.For the sawtooth feature that utilizes the single-slope prism, for fear of secondary light ray deflection, flat surfaces 16 needs enough wide.But wider flat surfaces can reduce the efficient of edge sawtooth feature, because flat surfaces can not be diffused into incident ray enough large angle, as shown in accompanying drawing 3A.
Accompanying drawing 4B shows a ray tracing model, and the light that wherein sends from spot light 21 incides on the recess of the single-slope sawtooth feature on the light input edge 22 of light guiding film 23.Accompanying drawing 4C shows a ray tracing model, and the light that wherein sends from spot light 21 incides on the flat surfaces top of single-slope sawtooth feature on the light input edge 22 of light guiding film 23.In these two models, the distance that spot light 21 is inputted edge 22 to the light of light guiding film 23 is 20mm.The diffusion angle of the light that spot light 21 sends is 160 degree.The Refractive Index of Material of light guiding film 23 is 1.59.Ray tracing clearly illustrate that ray trajectory due to total internal reflection by the deflection of inclined-plane institute.
Accompanying drawing 4D shows the illumination curve of output of the model that obtains from the light guiding film that has single-slope edge sawtooth feature at light input edge.Here spot light is to have lambert output and spacer knobs apart from being the LED of 6.3mm.As shown in curve of output, each curve is to begin at interval of 1mm (Y orientation) gained from distance input edge 0.5mm, and 5.5mm place, edge is inputted at distance light in clear zone and dark space still as seen.This curve of output also shows, from the input edge to the 1.5mm scope in hot issue at first become more and more less.Near Y=2.5mm, produced the hot issue of counter-rotating, the clear zone is dimmed and the dark space brightens here.Near Y=4.5mm, focus occurs again.This is that the secondary light ray deflection that is caused by total internal reflection is caused.
Therefore the efficient that needs a kind of improved input edge to relate to providing the more Uniform Illumination of light guiding film and do not sacrifice back light system.The object of the invention is to overcome in above-mentioned prior art relevant dark space and clear zone (focus) problem, thereby and produce and have the more light guiding film of Uniform Illumination under a kind of condition not sacrificing back light system efficient.
Summary of the invention
The invention provides a kind of light guiding film of the light that sends for the well-distributed points light source, comprise: the multiaspect edge, it is used for the light that the receiving station light source sends, this multiaspect edge comprises having at least the first group inclined-plane of flat surfaces, second group of inclined-plane therebetween, each is organized the inclined-plane and further comprises respectively the first and second slopes, wherein the first slope be no more than 85 the degree and the second slope be at least 5 the degree, the first slope at least than the second slope large 5 the degree.
the present invention further provides a kind of light guiding film of the light that sends for the well-distributed points light source, comprise: the multiaspect edge, it is used for the light that the receiving station light source sends, this multiaspect edge comprises at least the first group inclined-plane that has flat surfaces therebetween, second group of inclined-plane, each group inclined-plane further comprises second district on the first surface district that is positioned on multiaspect edge one side and a side opposite with the first surface district, wherein the inclined-plane ratio A3/A4 in second district on the inclined-plane ratio A1/A2 in the first surface district on first and second groups of inclined-planes and first and second groups of inclined-planes is between 0.1 to 9, and the ratio of the regional A5 of flat surfaces and whole feature surf zone is less than 0.3.
the present invention further provides a kind of light guiding film of the light that sends for the well-distributed points light source, comprise: the multiaspect edge, it is used for the light that the receiving station light source sends, this multiaspect edge comprises at least the first group inclined-plane that has flat surfaces therebetween, second group of inclined-plane, each is organized the inclined-plane and further comprises respectively the first and second slopes, each group inclined-plane further comprises second district on the first surface district that is positioned on multiaspect edge one side and a side opposite with the first surface district, wherein the inclined-plane ratio A3/A4 in second district on the inclined-plane ratio A1/A2 in the first surface district on first and second groups of inclined-planes and first and second groups of inclined-planes is between 0.1 to 9.
Description of drawings
Accompanying drawing 1 is the perspective view of a traditional planar light source;
Accompanying drawing 2 is one to show the schematic side elevational view of traditional LGP of ray trajectory;
Accompanying drawing 3A is for inputting at light the top view that the edge does not have the light guiding film of edge sawtooth feature;
Accompanying drawing 3B is the ray tracing model for the spot light of the light guiding film that does not have edge sawtooth feature at light input edge;
Accompanying drawing 3C is the ray tracing model at the illumination curve in different Y orientation for the light guiding film that does not have edge sawtooth feature at light input edge;
Accompanying drawing 4A is the top view of the light guiding film that has single-slope edge sawtooth feature at light input edge;
Accompanying drawing 4B is for when spot light is nearer apart from recess, inputs at light the ray tracing model that the edge has the light guiding film of single-slope edge sawtooth feature;
Accompanying drawing 4C is for when spot light is nearer apart from the flat surfaces top, inputs at light the ray tracing model that the edge has the light guiding film of single-slope edge sawtooth feature;
Accompanying drawing 4D is the ray tracing model at the illumination curve in different Y orientation of the light guiding film that has single-slope edge sawtooth feature at light input edge;
Accompanying drawing 5A is for inputting at light the top view that the edge has the light guiding film of a plurality of many slope characteristics parts;
Accompanying drawing 5B is the top view of the amplification of the light guiding film that has a plurality of many slope characteristics parts at light input edge;
Accompanying drawing 6A is the top view of the amplification of the light guiding film that has a plurality of two slope characteristics parts at light input edge;
Accompanying drawing 6B is the top view of the amplification of the light guiding film that has a plurality of two slope characteristics parts at light input edge, and has provided size and angle;
Accompanying drawing 6C is the oblique view of the amplification of the light guiding film that has a plurality of two slope characteristics parts at light input edge;
Accompanying drawing 6D is for inputting at light the side view that the edge has the light guiding film of a plurality of two slope characteristics parts, and wherein each face is rectangle;
Accompanying drawing 6E is for inputting at light the side view that the edge has the light guiding film of a plurality of two slope characteristics parts, and wherein the shape of each face is different;
Accompanying drawing 6F is the top view of the amplification of the light guiding film that has a plurality of two slope characteristics parts at light input edge, and has provided the change in the different face glazed threads direction of propagation;
Accompanying drawing 6G inputs at light the ray tracing model that the edge has the light guiding film of a plurality of two slope characteristics parts for when spot light is nearer apart from the flat surfaces top;
Accompanying drawing 6H is when the close feature recess of spot light, inputs at light the ray tracing model that the edge has the light guiding film of a plurality of two slope characteristics parts;
Accompanying drawing 6J is the ray tracing model of the illumination output of the light guiding film that has a plurality of two slope characteristics parts at light input edge;
Accompanying drawing 6K is the oblique view of the set of tools of milling machine tool that be used for to make multiaspect edge sawtooth feature;
Accompanying drawing 6L is the oblique view of two cutters be used for making two slope edge sawtooth features;
Accompanying drawing 6M is the side view of two cutters be used for making two slope edge sawtooth features;
Accompanying drawing 7 is for inputting at light the top view that the edge has the light guiding film of a plurality of two slope characteristics parts, and wherein the feature recess is sphering;
Accompanying drawing 8A has the top view of amplification of the light guiding film of a plurality of two slope characteristics parts for the light input edge that has on the whole the micro-scattering element;
Accompanying drawing 8B has the oblique view of amplification of the light guiding film of a plurality of two slope characteristics parts for the light input edge that has on the whole the micro-scattering element;
Accompanying drawing 8C has the oblique view of amplification of the light guiding film of a plurality of two slope characteristics parts for the light input edge that has on the whole the micro-scattering particle;
Accompanying drawing 9A is the top view of the amplification of the light guiding film that has a plurality of three slope characteristics parts at light input edge, and has provided size, slope angle and the not change of the coplanar glazing direction of propagation;
Accompanying drawing 9B is the oblique view for three cutters making three bevel edge sawtooth features;
Accompanying drawing 9C is the side view for three cutters making three bevel edge sawtooth features; And
Accompanying drawing 10 is the top view of the amplification of the light guiding film that has a plurality of four slope characteristics parts at light input edge, and has provided size, slope angle and the not change of the coplanar glazing direction of propagation.
The specific embodiment
Referring now to accompanying drawing, accompanying drawing 5A shows the light guiding film 33 with light input edge of the present invention, and light is inputted the edge and had a plurality of multiaspect features 32.Accompanying drawing 5B shows of the present invention one top view that amplifies.The light that spot light 31 sends incides on multiaspect feature 32.Each light source 31 covers at least one multiaspect feature.
Each multiaspect feature comprises a feature top and a feature recess.This feature top comprises a flat surfaces.Each multiaspect feature further comprises at least two group inclined-planes between feature top and adjacent feature recess in addition.Each group inclined-plane comprises two inclined-planes that are positioned at opposite both sides, feature top.Each plane or inclined-plane have a planar surface region.The inclination angle on each inclined-plane diminishes to the feature top gradually from the feature recess.The inclined-plane group of close feature recess has larger angle of inclination than the inclined-plane group at close feature top.In every group of inclined-plane, the angle of inclination on corresponding inclined-plane can be the same or different.In preferred each group inclined-plane, the angle of inclination on corresponding inclined-plane is identical, so that does not depart from towards a special angle direction of propagation of light.In each organized the inclined-plane, the surf zone on corresponding inclined-plane can be identical or different.In preferred each group inclined-plane, the surf zone on corresponding inclined-plane is identical, so that does not depart from towards a special angle direction of propagation of light.But, in manufacturing process, because the surf zone on the corresponding inclined-plane in each group of the tolerance of making inclined-plane may be different.The total surface number of multiaspect feature is 2*m+1, and wherein m is for equaling the integer of 2,3,4,5.......Because a plurality of masks have different deflections, they can be with light-redirecting to different angles.When the angle of inclination of suitably designing each face and face surf zone, light can be redirected in a wide angular range equably so that there is no visible clear zone and dark space in light guiding film.
Accompanying drawing 6A shows first embodiment of the present invention, and wherein light guiding film is included in a plurality of multiaspect features at light input edge.The multiaspect feature is made of two groups of different inclined-planes (two slopes).Light from LED light source 31 incides on two slope characteristics parts 42 of light guiding film 43.Two slope characteristics parts comprise first group that inclined- plane 421a and 421b form, second group and flat surfaces 423 that inclined- plane 422a and 422b form.The total surface number of every one or two slope characteristics part is 5 (2*2+1=5).
Referring now to accompanying drawing 6B and accompanying drawing 6C, accompanying drawing 6B has provided the top view of the two slope edge feature spares that comprise size and angle of inclination.In accompanying drawing 6C, provided respectively the profile in the face zone on two slope edge feature spares and each inclined-plane.With reference to accompanying drawing 6B and accompanying drawing 6C, inclined-plane 421a has face width degree W1 and face zone A1.Inclined-plane 422a has face width degree W2 and face zone A2.Inclined-plane 421b has face width degree W3 and face zone A3.Inclined-plane 422b has face width degree W4 and face zone A4.Flat surfaces has face width degree F and face zone A5.This two slope characteristics part has spacing P and height H.First group of inclined- plane 421a and 421b has one first tilt angle alpha.Second group of inclined- plane 422a and 422b has the second angle of inclination ω.The α angle is no more than 85 degree (α≤85 degree).The ω angle is at least 5 degree (ω 〉=5 degree).The α angle is than large at least 5 degree of ω angle (α-ω 〉=5 degree).Each side at two slope edge feature spares, chamfered region ratio A1/A2 and A3/A4 be (0.1≤A1/A2≤9 between 0.1 to 9,0.1≤A3/A4≤9), the ratio of otherwise planar surface area A5 and total characteristic spare surf zone is less than 0.3 (A5/ (A1+A2+A3+A4+A5)≤0.3).
Each face shown in accompanying drawing 6D can be rectangle.In manufacturing process, due to the flexibility of light guiding film, this shape may become trapezoidal or triangle.As shown in accompanying drawing 6E, the face shape can be trapezoidal, triangle or rectangle.The key of the design of multiaspect feature is to control the surf zone of the angle of inclination of each face and each face so that the incident light in light guiding film is distributed in a large angular range.
As shown in accompanying drawing 6F, the α angle is greater than the ω angle.Therefore first group of inclined- plane 421a and 421b, it can be with light-redirecting to a larger angle, as shown in taper 431a and 431b in accompanying drawing 4F near the feature recess.Inclined- plane 422a and 422b second group, it can be with light-redirecting to a less angle, as shown in taper 432a and 432b in accompanying drawing 6F near the feature top.Flat surfaces is generally propagated light forward, as shown in the taper 433 in accompanying drawing 6F.When the angle of inclination of suitably designing all five faces and surf zone, the combination of all five faces of two slope characteristics parts can consequently be can't see focus with light-redirecting to a wide angular range equably in light guiding film.
Accompanying drawing 6G shows a ray tracing model, wherein incides on the flat surfaces top 42 of two slope edge feature spares at light input edge of light guiding film 43 from the light of spot light 21.Accompanying drawing 6H shows a ray tracing model, wherein incides on the recess 44 of two slope edge feature spares at light input edge of light guiding film 43 from the light of spot light 21.In these two models, the distance that spot light 21 is inputted the edge apart from the light of light guiding film 43 is 20mm.The diffusion angle of the light that sends from spot light 21 is 160 degree.The Refractive Index of Material of light guiding film 43 is 1.59.Model shows that light is diffused into a very large angle and not by adjacent inclined-plane deflection.
Accompanying drawing 6J shows the illumination curve of output of the ray tracing model of the light guiding film that has two slope characteristics parts at light input edge.Here spot light is to have lambert output and spacer knobs apart from being the LED of 6.3mm.As shown in curve of output, each curve is to begin at interval of 1mm (Y orientation) gained from distance input edge 0.5mm, and near Y=2.5mm, clear zone and dark space or focus have disappeared.
In order to make two slope edge sawtooth features, a kind of method is to utilize two different cutters to make two groups of inclined-planes, flies cutter and makes flat surfaces and utilize.Accompanying drawing 6K shows and comprises the set of tools 451 that flies cutter 452 and cut the two cutter fixtures for tools 453 on two groups of inclined-planes that produces flat surfaces.In order to cut many slopes edges sawtooth feature, set of tools 451 is with certain speed rotation.Simultaneously, light guiding film stacking 460 is advanced below set of tools 451 with certain speed.Accompanying drawing 6L shows the fixtures for tools 453 that comprises the first cutter 455 and the second cutter 456.The first cutter 455 has the bevel angle different from the second cutter 456.Accompanying drawing 6M shows the side view of two cutters.
An alternative embodiment of the invention comprises a plurality of multiaspect edge feature spares, and its recess with two kinds of slopes and feature has radian.Accompanying drawing 7 shows that recess has the feature of radian.Preferred radian is less, because arc-shaped depression portion has reduced the anaclasis energy and light can not be a large angular spread.
Accompanying drawing 8A, 8B and 8C show the two slope edge sawtooth features that further comprise light-scattering component 526.These light-scattering components can be microchannels, slot scraping, particle, micro-protrusions or rough surface.
Accompanying drawing 9A shows an alternative embodiment of the invention, and wherein light guiding film comprises a plurality of three slope multiaspect features 72 at light input edge.Each three slope edge sawtooth feature 72 comprises inclined-plane 721a with first tilt angle alpha and 721b first group, have the inclined-plane 722a of the second inclination angle beta and 722b second group, have the inclined-plane 723a of the 3rd angle of inclination ω and the 3rd group and the flat surfaces 724 of 723b.The total surface number is 7 (2*3+1=7).The inclined-plane of close feature recess has larger angle of inclination than the inclined-plane at close feature top, i.e. α＞β＞ω.The α angle is no more than 85 degree (α≤85 degree).The ω angle is at least 5 degree (ω 〉=5 degree).
As shown in accompanying drawing 9A, first group of the inclined-plane is redirected to incident ray in taper 731a and 731b, second group of the inclined-plane is redirected to incident ray in taper 732a and 732b, the 3rd group of the inclined-plane is redirected to incident ray in taper 733a and 733b, and flat surfaces is redirected to incident ray in taper 734.When the angle of inclination of suitably designing all faces and surf zone, can equably incident light be redirected to a wide angular range so that eliminate hot issue.
Accompanying drawing 9B shows the cutter that can be used for making three groups of inclined-planes.The first cutter 751, the second cutter 752 and the 3rd cutter 753 are installed on fixtures for tools 754.First cutter 751 here, the second cutter 752 and the 3rd cutter 753 have different bevel angles.Accompanying drawing 9C shows the side view of these cutters.
Accompanying drawing 10 shows an alternative embodiment of the invention, and wherein light guiding film comprises a plurality of four slope multiaspect features at light input edge.Each four slope characteristics part 82 comprises inclined-plane 821a with first tilt angle alpha and 821b first group, have the inclined-plane 822a of the second inclination angle beta and 822b second group, have the inclined-plane 823a of the 3rd angle of inclination γ and 823b the 3rd group, have the inclined-plane 824a of the 4th angle of inclination ω and the 4th group and the flat surfaces 825 of 824b.The total surface number is 9 (2*4+1=9).The inclined-plane of close feature recess has larger angle of inclination than the inclined-plane at close feature top, i.e. α＞β＞γ＞ω.The α angle is no more than 85 degree (α≤85 degree).The ω angle is at least 5 degree (ω 〉=5 degree).
As shown in Figure 10, first group of the inclined-plane is redirected to incident ray in taper 831a and 831b, second group of the inclined-plane is redirected to incident ray in taper 832a and 832b, the 3rd group of the inclined-plane is redirected to incident ray in taper 833a and 833b, the 4th group of the inclined-plane is redirected to incident ray in taper 834a and 834b, and flat surfaces is redirected to incident ray in taper 835.When the angle of inclination of suitably designing all faces and surf zone, can equably incident light be redirected to a wide angular range so that eliminate hot issue.
Claims (11)
1. light guiding film, be used for distributing from the light of spot light equably, described light guiding film comprises: be used for receiving the multiaspect edge from the light of spot light, this multiaspect edge comprises at least the first group and the second group of inclined-plane that has flat surfaces therebetween, each is organized the inclined-plane and further comprises respectively the first and second slopes, wherein the first slope be no more than 85 the degree and the second slope be at least 5 the degree, first slope ratio the second slope large at least 5 the degree.
2. light guiding film as claimed in claim 1 is characterized in that: the recess at this multiaspect edge comprises radian.
3. light guiding film as claimed in claim 1 is characterized in that: the surface at multiaspect edge comprises light-scattering component.
4. light guiding film as claimed in claim 1, further comprise the 3rd group of inclined-plane that has flat surfaces therebetween.
5. light guiding film as claimed in claim 4, further comprise the 4th group of inclined-plane that has flat surfaces therebetween.
6. light guiding film, be used for distributing from the light of spot light equably, this light guiding film comprises: be used for receiving the multiaspect edge from the light of spot light, this multiaspect edge comprises at least the first group and the second group of inclined-plane that has flat surfaces therebetween, each group inclined-plane further comprises second district on the first surface district that is positioned on multiaspect edge one side and a side opposite with the first surface district, wherein the inclined-plane ratio A3/A4 in second district on the inclined-plane ratio A1/A2 in the first surface district on first group and second group inclined-plane and first and second groups of inclined-planes is between 0.1 to 9, and the ratio in the regional A5 of flat surfaces and zone, whole feature surface is less than 0.3.
7. light guiding film as claimed in claim 6 is characterized in that: the recess at this multiaspect edge comprises radian.
8. light guiding film as claimed in claim 6 is characterized in that: the surface at multiaspect edge comprises light-scattering component.
9. light guiding film as claimed in claim 6, further comprise the 3rd group of inclined-plane that has flat surfaces therebetween.
10. light guiding film as claimed in claim 9, further comprise the 4th group of inclined-plane that has flat surfaces therebetween.
11. light guiding film, be used for distributing from the light of spot light equably, it comprises: be used for receiving the multiaspect edge from the light of spot light, this multiaspect edge comprises at least the first group and the second group of inclined-plane that has flat surfaces therebetween, each is organized the inclined-plane and comprises respectively the first and second slopes, and, each group inclined-plane further comprises second district on the first surface district that is positioned on multiaspect edge one side and a side opposite with the first surface district, wherein the inclined-plane ratio A3/A4 in second district on the inclined-plane ratio A1/A2 in the first surface district on first group and second group inclined-plane and first and second groups of inclined-planes is between 0.1 to 9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201113273033A | 2011-10-13 | 2011-10-13 | |
| US13/273,033 | 2011-10-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103090315A true CN103090315A (en) | 2013-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210517392XA Pending CN103090315A (en) | 2011-10-13 | 2012-10-15 | Light guide film with multi-faceted light input edge |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2013089597A (en) |
| KR (1) | KR20130040165A (en) |
| CN (1) | CN103090315A (en) |
| TW (1) | TW201331645A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109964078A (en) * | 2016-09-21 | 2019-07-02 | Exa电子有限公司 | Utilize the illumination component of light guiding film |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200827871A (en) * | 2006-10-19 | 2008-07-01 | Kuraray Co | Surface light source element and manufacturing method thereof |
| CN101395424A (en) * | 2006-03-30 | 2009-03-25 | 日立麦克赛尔株式会社 | Direct underneath type backlight device, and optical lens sheet |
| CN101427070A (en) * | 2006-04-27 | 2009-05-06 | 富士通株式会社 | Illumination device and liquid crystal display device |
-
2012
- 2012-10-12 JP JP2012226656A patent/JP2013089597A/en active Pending
- 2012-10-12 TW TW101137657A patent/TW201331645A/en unknown
- 2012-10-15 KR KR1020120114293A patent/KR20130040165A/en not_active Application Discontinuation
- 2012-10-15 CN CN201210517392XA patent/CN103090315A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101395424A (en) * | 2006-03-30 | 2009-03-25 | 日立麦克赛尔株式会社 | Direct underneath type backlight device, and optical lens sheet |
| CN101427070A (en) * | 2006-04-27 | 2009-05-06 | 富士通株式会社 | Illumination device and liquid crystal display device |
| TW200827871A (en) * | 2006-10-19 | 2008-07-01 | Kuraray Co | Surface light source element and manufacturing method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109964078A (en) * | 2016-09-21 | 2019-07-02 | Exa电子有限公司 | Utilize the illumination component of light guiding film |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013089597A (en) | 2013-05-13 |
| KR20130040165A (en) | 2013-04-23 |
| TW201331645A (en) | 2013-08-01 |
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Application publication date: 20130508 |